Nectar sugar production across floral phases in the gynodioecious protandrous plant Geranium sylvaticum
Varga, S., Nuortila, C., & Kytöviita, M.-M. (2013). Nectar sugar production across floral phases in the gynodioecious protandrous plant Geranium sylvaticum. PLOS ONE, 8(4), e62575. https://doi.org/10.1371/journal.pone.0062575
Julkaistu sarjassa
PLOS ONEPäivämäärä
2013Tekijänoikeudet
© 2013 Varga et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Many zoophilous plants attract their pollinators by offering nectar as a reward. In gynodioecious plants (i.e. populations are
composed of female and hermaphrodite individuals) nectar production has been repeatedly reported to be larger in
hermaphrodite compared to female flowers even though nectar production across the different floral phases in
dichogamous plants (i.e. plants with time separation of pollen dispersal and stigma receptivity) has rarely been examined. In
this study, sugar production in nectar standing crop and secretion rate were investigated in Geranium sylvaticum,
a gynodioecious plant species with protandry (i.e. with hermaphrodite flowers releasing their pollen before the stigma is
receptive). We found that flowers from hermaphrodites produced more nectar than female flowers in terms of total nectar
sugar content. In addition, differences in nectar production among floral phases were found in hermaphrodite flowers but
not in female flowers. In hermaphrodite flowers, maximum sugar content coincided with pollen presentation and declined
slightly towards the female phase, indicating nectar reabsorption, whereas in female flowers sugar content did not differ
between the floral phases. These differences in floral reward are discussed in relation to visitation patterns by pollinators
and seed production in this species.
...
Julkaisija
Public Library of ScienceISSN Hae Julkaisufoorumista
1932-6203
Alkuperäislähde
http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0062575Julkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/22445517
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